pulsar-client-kafka-compat/pulsar-client-kafka/src/main/java/org/apache/kafka/clients/producer/PulsarKafkaProducer.java [277:288]:
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        throw new UnsupportedOperationException();
    }

    @Override
    public Map<MetricName, ? extends Metric> metrics() {
        return Collections.emptyMap();
    }

    @Override
    public void close() {
        close(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
        partitioner.close();
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pulsar-client-kafka-compat/pulsar-client-kafka_0_9/src/main/java/org/apache/kafka/clients/producer/PulsarKafkaProducer.java [226:237]:
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        throw new UnsupportedOperationException();
    }

    @Override
    public Map<MetricName, ? extends Metric> metrics() {
        return Collections.emptyMap();
    }

    @Override
    public void close() {
        close(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
        partitioner.close();
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